package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Objects;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐，同时保存套餐和菜品的相关信息
     *
     * @param setmealDTO
     */
    @Override
    public void saveWithDishes(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        // 向套餐表插入数据
        setmealMapper.insert(setmeal);

        // 获取生成的套餐id
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(setmealId));

        setmealDishMapper.insertBaches(setmealDishes);

    }

    /**
     * 套餐分页查询
     *
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 删除套餐
     *
     * @param ids
     */
    @Transactional
    @Override
    public void delete(List<Long> ids) {
        ids.forEach(id -> {
            SetmealVO setmealVO = setmealMapper.getById(id);
            if (StatusConstant.ENABLE.equals(setmealVO.getStatus()))
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
        });

        ids.forEach(id -> {
            // 删除套餐关联的菜品数据
            setmealDishMapper.deteleBySetmealId(id);
            // 删除套餐
            setmealMapper.deleteById(id);
        });
    }

    /**
     * 根据id查询套餐及关联菜品信息
     *
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDishes(Long id) {
        SetmealVO setmealVO = setmealMapper.getById(id);
        setmealVO.setSetmealDishes(setmealDishMapper.getBySetmealId(id));
        log.info("setmealVO: {}", setmealVO);
        return setmealVO;
    }

    /**
     * 修改套餐以及关联菜品
     *
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void updateAndDishes(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);
        setmealMapper.update(setmeal);
        Long setmealId = setmeal.getId();
        setmealDishMapper.deteleBySetmealId(setmealId);
        log.info("setmealId: {}", setmealId);
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> setmealDish.setSetmealId(setmealId));
        setmealDishMapper.insertBaches(setmealDishes);
    }


    /**
     * 起售或禁售套餐
     *
     * @param status
     * @param id
     */
    @Override
    public void setStatus(Integer status, Long id) {
        // 判断套餐内是否有禁售菜品，如果有，套餐不能起售
        if (Objects.equals(status, StatusConstant.ENABLE)) {
            List<Dish> dishes = dishMapper.getBySetmealId(id);
            if (dishes != null && !dishes.isEmpty()) {
                dishes.forEach(dish -> {
                    if (Objects.equals(dish.getStatus(), StatusConstant.DISABLE))
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                });
            }
        }

        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
